Gyratory driving mechanism.



J. B. CORNWALL.

GYRATORY DRIVING MECHANISM.

APPLICATION FILED MAY 6, I916.

Patented Dec. 12, 1916.

:1 iii UNITE ATE A f JOHN B. CORNWALL, OF MOLINE, ILLINOIS, ASSIGNOR TO BARNABD AND LEAS MANU- FACTURING COMPANY, OF MOLINE, ILLINOIS, A CORPORATION OF ILLINOIS.

GYBATORY DRIVING MECHANISM.

Application filed May 6, 1916.

To all whom it may concern:

Be it known that I, JOHN B. CORNWALL,

a citizen of the United States, residing at Moline, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in Gyratory Driving Mechanisms; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

This invention relates to so-called gyratory drives, or means for imparting a gyratory motion to bodies, and in particular is an improvement upon the gyratory driving mechanism shown in my application for patent filed August 1 1, 1915, Serial No. 415,505; which was designed for use in connection with so-called plansifter bolting machines.

The invention in brief consists in novel means for driving gyrating bodies, such as plansifter sieves and the like, said driving means being so constructed and counterbalanced as to in itself automatically compensate for and counteract the strains of centrifugal force and practically obviate jarring and vibration, while enabling the degree of gyratory motion imparted from the driving shaft to the driven object to be varied; and the object of the present invention is to cause the means which compensates for or counteracts the centrifugal force to adjust itself automatically.

I will explain in detail one embodiment of the invention as illustrated in the accompanying drawings, to enable others skilled in the art to adopt and use the same in con nection with other devices, and summarize in the claims the essential novel features and combinations of parts for which protection is desired.

In the drawings: Figure 1 is a sectional elevation of a plansifter driving mechanism containing one embodiment of the invention; Fig. 2 is an enlarged top plan view of the driving mechanism detached; Fig. 3 is a detail view of part of the driving mechanism.

Referring to the drawings, A designates part of the sieve box of a plansifter which may be suspended in the usual manner above the driving mechanism, that includes a base member E in which is a vertical driv- 5 ing shaft D supported at its lower end in Specification of Letters Patent.

Patented Dec. 12, 1916..

Serial No. 95,870.

the base, and journaled near its upper end in adjustable bearings in the base member and carrying a pulley H bywhich it can be rotated.

Attached to the sieve box is a stud J which depends into a socket in a casting 1 (see Fig. 2) which is provided with sleeves 1 by which it is slidably supported on rods amounted between studs 5*, 5 on the up per surface of a casting or plate 5 mounted upon and preferably rigidly attached to the upper end of the shaft D. Springs 1 strung on rods 4: normally tend to press the casting 1 in a direction away from the studs 5 The casting 1 is provided with a weight 2; which can be adjusted toward or from the stud J by means of a threaded shaft 2. The plate 5 is provided below the weighted end of the plate 1 with a slot or chamber 5 in which is mounted an adjustable weight 6. The weight 6 should be normally sufficient to counter-balance or neutralize the centrifugal force tending to eccentrically displace the shaft D in its bearings during the normal operation of the machine; and to relieve the plate 5 and shaft D of the lateral pressure which is exerted by centrifugal force through the plate 1 from the sieve box against the spring 1 when the machine is innormal operation.

The parts thus far referred to are, or may be, constructed as shown and described in my aforesaid application and need no further detailed explanation herein.

As shown weight 6 may have a slot 6 with which is engaged the lower end of a rocking lever 7 which is pivoted on a pin 7 extending across the slot 5 above the weight. The upper end of this lever is engaged in a slot 1 in the plate 1 below the weight 2. Weight 6 may be provided with removable or changeable auxiliary weights indicated at 6 which may be secured there to by bolt 6 and by means of which the total effective weight of this counter-balance 6 can be obtained. I

It will be observed that the parts above the plate 5 are not fixedly attached. to the base, as plate 1 is slidably supported upon the rods 4 therefore when the plate 1 moves in one direction longitudinally of the plate 5, in order to permit a larger gyration of the Sifter, the weight 6 in the plate 5 will be moved in the opposite direction by the action of lever 7 so as to counter-balance the extra centrifugal force caused by the larger gyration of the 'sifter.

The lever 7 is so pivoted on the plate 5 that the counter-balancing weight 6 will always move simultaneously with but opp'o- 7 force against the shaft D and its supporting base,such additional thrust will be compensated for by the outward movement of the weight 6 in the plate 5, which weight is actuated the lever 7 that will be rocked by the movement of plate 1 to allow the sifter to make a larger gyration, and this movement of weight 6 outward from the base automatically counter-balances the centrifugal thrust on the shaft caused by the larger gyration of the sifter.

By the described construction and arrangement of the parts when the machine is inoperation motionis transferred from the shaft D to the stud J and centrifugal force tending to unduly displace the sieve box is automatically compensated for or neutralized. V

The construction shown anddescribed is practical and eflicient, but I do not consider the invention restricted to such particular embodiment thereof, as when once understood others may readily. adapt the invention to other devices and in other forms within the scope of the claims.

What I claim is:

1. In combination, a member, means for imparting gyratory movements to said member; counter-acting means, and means whereby when the member tends to be moved under the actionof centrifugal force caused by variation in the load the counteracting means is moved to counter-act the thrust of suchforce due to'such variation in the load.

2. In combination, a body, a driven member for imparting gyratory movements to said body; counter-acting means, and means whereby when the driven member is moved in one direction under the actionof centrifugal force thecounter-acting member is 'positively moved in theopposite direction.

3; In a gyratory drive, the combination of a :driving member, a driven member movable radially'or transversely of the'driving Imember under the action of centrifugal force, a counter-acting member, and connections whereby whenthe dr ven member is moved inon'e direction by centrifugal action the counter-acting member is moved in'the opposite direction. g i

4:- Means for'imparting gyratory, motion to objects, comprising a driving shaft, a

driven member mounted on and movable transversely of the driving shaft, counteracting means, and means operatively controlled and automatically actuated by the first member whereby the counteracting means is positively shifted to counter-act the thrust of centrifugal force on the shaft.

5. In a gyratory drive the combination of a driving member, a driven member movable transversely of the driving member under the action of centrifugal force, a counter-acting member, and connections whereby when the driven member is thrust by centrifugal foi'ce d'ue to variations in the load the counter-acting member is automatically moved in to offset or neutralize such thrust.

6. In a 'gyratorydrive the combination of a driving member, a driven member movable radially of the driving member under the action of centrifugal force, a counteracting member, and connections whereby when the. driven member is moved in one direction by "centrifugal action the counteracting member is positively and automatically moved in the opposite direction to offset or neutralize the thrust of centrifugal force on the driving member.

7 In means for imparting gyratory motion 'to objects, a driving shaft, a body to be gyrated, means connected with said body and o'perat'ively engaged with said driving shaft, means for resisting the centrifugal force due 'to speed tending to shift the bod radially of the driving shaft when the machine is in operation, and automatic means 'for neutralizing the variations in centrifugal force caused by variations in the load on the-body, substantially as described. I

8. Means for imparting gyratory motion 'to objects, comprisinga driving shaft, a

driven 'member, an intermediate member connected with and movable transversely of the driving shaft and engaging the driven member,,means carried b'y said intermediate member for'counter-acting the effect of excessivecentrifugal force; and'operative connections whereby when the intermediate member moves transversely of said shaft in one 'dlrectlon said counter-acting means is shifted in the opposite direction.

9. Means for imparting gyratory motion to objects, comprising a driving shaft, a driven member movable transversely of the driving shaft, means adapted to resist the lateral'inovenient of said drivenmen'i'ber due to centrifugalforce, 'inovable meansto counter-act orneutrahze excessive effects of centrifugal force, and operative connections whereby when the driven member moves transversely of said shaft in one direction saidcounter-acting means is shifted in the opposite direction.

10. In a gyratory drive for plansifters and the like, the combination of a driving shaft, a member fixedly attached thereto,

a counter-acting weight movably mounted on said member, a movable member slidably mounted upon said fixed member, and means adapted to retain the movable member in normal position and resist the action of centrifugal force when the machine is in operation; with a rocking lever engaging said movable member and said counter-acting weight whereby said parts are caused to move oppositely.

11. In a gyratory drive for plansifters and the like, the combination of a driving shaft, a member fixedly attached thereto a weight movably mounted on said member, a

\ transversel movable member mounted upon said fixed member, and Springs adapted to retain the movable member in normal position and resist the action of centrifugal force when the machine is in operation; with a body, a stud attached thereto engaging said movable member, and a rocking lever engaging said movable member and said weight whereby excessive thrust of the gyrating body upon the shaft when the machine is in operation is counter-acted or neutralized.

In testimony that I claim the foregoing as my own', I aflix my signature.

JOHN B. CORNWALL.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, 1D. (2. 

